Syntheses and structural characterization of water-soluble selenium reagents for the redox control of protein disulfide bonds
作者:Michio Iwaoka、Taro Takahashi、Shuji Tomoda
DOI:10.1002/hc.1047
日期:——
A new class of water-soluble redox reagents (1–4) that contain selenium as the active site was developed for the purpose of the redox control of protein structures. The X-ray crystallographic analyses revealed that trans-3,4-dihydroxy-1-selenolane (DHSred) (1) and its Se-oxide (DHSox) (2) have two axial hydroxy groups on the selenolane five-membered ring, whereas trans-1,2-diselenane-4,5-diol (DSTox)
为了对蛋白质结构进行氧化还原控制,开发了一类新的含有硒作为活性位点的水溶性氧化还原试剂 (1-4)。X 射线晶体学分析表明,反式-3,4-二羟基-1-硒烷 (DHSred) (1) 及其氧化硒 (DHSox) (2) 在硒烷五元环上具有两个轴向羟基,而trans-1,2-diselenane-4,5-diol (DSTox) (3) 是氧化二硫苏糖醇 (DTTox) 的硒类似物,在二硒烷六元环上具有两个赤道羟基。根据观察到的 1-3 的邻位 3JHH 耦合常数,表明它们在溶液中采用与固态相似的结构。也合成了二硒苏糖醇 (DSTred) (4),一种二硫苏糖醇 (DTTred) 的硒类似物,但它对空气过于敏感而无法分离。1-4 与 DTTox 和 DTTred 的反应表明 DHSox (2) 的氧化能力远远超过 DTTox,而 DSTred (4) 的还原能力超过 DTTred。© 2001